Roll for india-rubber mixing and calendering machines



(No Model.)

E. B BRAGG: Y ROLL POR INDIA RUBBER MIXING'AND CALBNDERING MACHINES.

No. 508,272. Patented Nw.v '7, 189s.

UNITED PAT-ENT OFFICE. i

" EDWARD FQBRAGG, OF CAMBRIDGE, ASSIGNOR TO `THE AUTOMATIC vRUBBER COMPANY,- OFBOSTON, MASSACHUSETTS.

ROLL` FOVR INDIA-,RUBBER MIXING AND CALENDERING MACHINES.

SPECIFICATION forming part of Letters lPatent No. 508,272,dated November 7, 1893.

Alipuainiie Aprire, 189s. sean No. 468,833.7 (Nomen Y To a/ZZ whom t may'. concern/.-

Be it known that'I, EDWARD F. BRAGG,-of Cambridge, county of Middlesex, State of Massachusetts, have invented an, Improvement in Rolls for India-R`ubber Mixing and Calendering Machines,'&c., .of which the following description, in connection with the accompanying drawings, is a specification, like` letters on the drawings representing like parts. Y

Application, Serial No. 450,311, liled October 29, 1892, by Robert Cowen and Edward F.

Bragg, shows a roll for india-rubber mixing and calendering machines, &c.,wherein a cooling fluid as water is-introduced through journals at one end of the roll and is circulated through longitudinal peripheral passages to the outlet at the opposite journal of the roll to thereby cool theV periphery of the roll to prevent its heating and injuring the material being worked. This invention has for its object to provide another form of roll for accomplishing the same result. Whereas in the roll shown in the application referred to the peripheral passages extendlongitudinally or parallel with the axis of the roll, in this my new form of roll, the peripheral passages are made annular, t'. e., extending around the roll circumferentially in planesperpendicular to the axis of the roll, said annularpassages being connected in sui-table manner/with the axial inlet and outlet to form communications between the same.

Figure l, represents in vertical section a roll embodying thisinvention, the section being taken on the dotted line mum, Fig. 2; Fig.

2, a vertical section of the same taken on themay run parallel with and close to each other.

The roll. inaccordance with this invention is:providedf.with a series of annular or'circumferential circulating passages c, c, located 'preferably `close tothe periphery of dthe roll and embedded therein, such annular passages being, in', the construction shown, located in planes perpendicular to the axis of the roll. The annular circulating passages c, c, are each connected at preferably diametrically opposite points with the inlet and outlet respectively by the radial inlet and outlet pipes c', c2, as shown. In the preferred construction, as in Fig. 1, the radial inlet passages for the successive annular passages enter the latter at diametrically opposite sides of the roll, 't'. e., following the entrance passage linto the roll, the first radial inlet pipe leads from the axial inlet to the left to the first annular passage, while the radial inlet for the second annular passage leaves the axial inlet at the right; the third tothe left,.the fourth to the right, &c., alternately throughout the entire length of the roll, the return axial pipes like- Wise leading to the axial outlet alternately from the opposite sides of the roll, the result being that when the cooling fluid, as water, is introduced into the roll through the axial inlet B, said iuid will reach the first annular passage at one side of the roll, the second at the opposite side of the roll, and so on throughout the entire series of annular passages, the result being that the dow of the fluid through successive annular passages is in opposite directions from the coolest to the hottest parts of the passages, therebyobtaininga uniform mean temperature between the hottest and coolest portions of the cooling fluid, such uniform temperature being quite essential when the roll is used in many classes of work.

I prefer to construct the roll in the manner illustrated in the drawingswhereinthe several passages are formed by suitable pipes placed in the mold before casting, the metal of the roll being thereafter cast about these i es, leaving the assaUes free and clear. I

culating passages whereby a cooling fluid introduced at the inlet is caused to circulate through the annular passages within the periphery of the roll to cool the latter before flowing out through the outlet. It matters not, of course, that the annular circulating passages do not lie in planes exactly perpendicular to the axis of the roll, although such is the preferred construction.

I claim- 1. A metal roll having both an axial inlet and outlet, and a series of independent annular circulating passages connecting the same, substantially as described.

2. A metal roll having both axial inlet and outlet passages extending substantially the entire length of the roll, in combination with a series of independent annular passages located near the periphery of the roll, and radial passages connecting the same with said inlet and outlet passages whereby fluid introduced through the inlet is caused to flow through said annular passages to the outlet, substantially as described.

3. A metal roll having axial inlet and outlet passages extending substantially the entire length of the roll, in combination with a series of independent annular passages and radial passages connecting opposite points of each with said inlet and outlet passages respectively, the successive radial passages leading from the inlet passage extending in opposite directions, whereby liuid of the same temperature is introduced into successive annular passages at opposite sides of the roll wherebya mean temperature is obtained, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

EDWARD F. BRAGG.

Witnesses:

FREDERICK L. EMERY, JOHN C. EDWARDS. 

